merchant calculation callback

I’ve had one of my worst days programming ever – which is a big call I know – but seriously after today I think no Magento bug will ever faze me again.

So for anyone Googling about Magento 1.4.2 and Google Checkout, here’s a couple of tips based on this bug report.

Flat Rate Google Checkout shipping

There’s a warning generated by Magento if you do not have all 3 flat rate options filled in:

Warning: number_format() expects parameter 1 to be double, string given

The solution is to check if they are populated in the app/code/core/Mage/GoogleCheckout/Model/Api/Xml/Checkout.php before sending them.
Continue reading Magento 1.4.2 and Google Checkout – Debugging weight-based table rate issues

Long time, no post – busy time with Christmas and New years. I went to Mahia Beach on the east coast of New Zealand, amazing place – I was lucky enough to swim with a wild dolphin named Moko, he stole someones boogie board too!

Anyway, to more nerdy subject matter, I recently upgraded our Magento webstore to version 1.2.0.1 – it was relatively painless except for one major hiccup. There seems to be a bug with the configuration scopes in the new version of Magento that means the HTTPS URL is not propagating to the webstore from the default configuration scope.

The problem manifests itself as your Google Checkout merchant calculated shipping callback failing (and subsequently using the default amount). There is a message in the Google checkout integration console:

URL you are using for merchant calculations is not valid or is not https http://www.yourdomain.com/googlecheckout/api/ — the error we got is: An HTTPS URL is required.

Continue reading Magento 1.2.0.1 Fails when using Google Checkout Merchant Calculated Shipping Callbacks: An HTTPS URL is required.